1810999 - Firefox build fails with: ModuleNotFoundError: No module named 'winreg'

Status: RESOLVED INVALID

(Firefox Build System :: General, defect)

Description

[Ho Cheung]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Steps to reproduce:

After pulling the latest code and running the ./mach build command

I use Debian 11 to cross compile firefox for windows

Actual results:

it prompts ModuleNotFoundError: No module named 'winreg' error, unable to compile firefox normally

Expected results:

No errors, able to compile normally

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox Build System::General' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Mike Hommey [:glandium]]

That suggests you're missing some things in your mozconfig. What are the contents of your mozconfig, and what specific revision are you building (there have been changes recently to make things easier)?

Comment 3

[Ho Cheung]

Attachment: # This file specifie

(In reply to Mike Hommey [:glandium] from comment #2)
> That suggests you're missing some things in your mozconfig. What are the contents of your mozconfig, and what specific revision are you building (there have been changes recently to make things easier)?

I build with the latest code tree and use the following mozconfig

Comment 4

[Ho Cheung]

Attachment: .mozconfig

Comment 5

[Mike Hommey [:glandium]]

You're missing WINSYSROOT.

Comment 6

[Ho Cheung]

@Mike Is there any documentation on WINSYSROOT?

Comment 7

[Mike Hommey [:glandium]]

https://searchfox.org/mozilla-central/source/build/moz.configure/toolchain.configure#558-561 (it's in the output of ./mach configure -- --help)
In a few weeks time, you won't need to set WINSYSROOT at all, one will be bootstrapped for you.

Comment 8

[Ho Cheung]

@Mike
How to set up WINSYSROOT on the Debian system, and whether msvc and sdk files should be included in WINSYSROOT?